Method for controlling activation of BWP, user equipment and base station

ABSTRACT

A method for controlling activation of a bandwidth part (BWP), a user equipment, and a base station are provided. The method includes: receiving BWP configuration information transmitted by a base station; receiving a primary cell handover command transmitted by the base station, wherein the primary cell handover command is configured to indicate a target primary cell for handover and a default BWP on the target primary cell; and performing a cell handover based on the default BWP on the target primary cell and the target primary cell.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation application of U.S. patentapplication Ser. No. 16/638,108 filed on Feb. 10, 2020, which is theU.S. national phase of PCT Application No. PCT/CN2018/098001 filed onAug. 1, 2018, and claims a priority to Chinese Patent Application No.201710687870.4 filed on Aug. 11, 2017. All of these disclosures areincorporated herein by reference in their entireties.

TECHNICAL FIELD

The present disclosure relates to the technical field of communications,and in particular to a method for controlling activation of a BWP, auser equipment and a base station.

BACKGROUND

In the 5^(th) Generation (5G) wireless communication system using a newradio access (NR) technique, a cell supports a maximum system bandwidthof 400 MHz, which is much higher than a maximum LTE system bandwidth of20 MHz, so as to support a larger system and user throughput. However,it may be a huge challenge for an implementation of a user equipment(UE) to support such a high system bandwidth, which is not conducive tothe implementation of low-cost UEs. Therefore, the 5G NR system alsosupports dynamic and flexible bandwidth allocation, where the systembandwidth is divided into multiple bandwidth parts (BWPs) to supportaccesses of narrowband user terminals or user terminals in anenergy-saving mode. In the related art, all BWPs supported by a UE aregenerally activated. Since the UE can support multiple BWPs, the powerconsumption of the UE may increase, if all the BWPs are simultaneouslyactivated. Therefore, how to flexibly control activated states ofmultiple BWPs for a UE becomes a technical problem that needs to besolved urgently.

SUMMARY

In a first aspect, an embodiment of the present disclosure provides amethod for controlling activation of a bandwidth part (BWP), including:

-   -   receiving and saving BWP configuration information transmitted        by a base station, where the BWP configuration information        includes BWP identification information;    -   receiving a BWP activation command transmitted by the base        station; and    -   performing BWP activation with a BWP identifier indicated by the        BWP activation command.

In a second aspect, an embodiment of the present disclosure furtherprovides a method for controlling activation of a bandwidth part (BWP),including:

-   -   transmitting BWP configuration information to a user equipment,        where the BWP configuration information includes BWP        identification information; and    -   transmitting a BWP activation command to the user equipment,        where the BWP activation command is configured for the user        equipment to perform BWP activation with a BWP identifier        indicated by the BWP activation command.

In a third aspect, an embodiment of the present disclosure furtherprovides a user equipment, including:

-   -   a configuration reception module, configured to receive and save        BWP configuration information transmitted by a base station,        where the BWP configuration information includes BWP        identification information;    -   a command reception module, configured to receive a BWP        activation command transmitted by the base station; and    -   a processing module, configured to perform BWP activation with a        BWP identifier indicated by the BWP activation command.

In a fourth aspect, an embodiment of the present disclosure furtherprovides a base station, including:

-   -   a configuration transmission module, configured to transmit BWP        configuration information to a user equipment, where the BWP        configuration information includes BWP identification        information; and    -   a command transmission module, configured to transmit a BWP        activation command to the user equipment, where the BWP        activation command is configured for the user equipment to        perform BWP activation with a BWP identifier indicated by the        BWP activation command.

In a fifth aspect, an embodiment of the present disclosure furtherprovides an electronic device, including:

-   -   one or more processors;    -   a memory; and    -   one or more programs, where the one or more programs are stored        in the memory and configured to be executed by the one or more        processors, and the one or more programs are executed to        implement steps in the method for controlling activation of a        bandwidth part (BWP) as described in the above first aspect.

In a sixth aspect, an embodiment of the present disclosure furtherprovides an electronic device, including:

-   -   one or more processors;    -   a memory; and    -   one or more programs, where the one or more programs are stored        in the memory and configured to be executed by the one or more        processors, and the one or more programs are executed to        implement steps in the method for controlling activation of a        bandwidth part (BWP) as described in the above second aspect.

In a seventh aspect, an embodiment of the present disclosure furtherprovides a computer-readable storage medium, on which a program isstored. The program is executed by a processor to implement steps in themethod for controlling activation of a bandwidth part (BWP) as describedin the above first aspect and/or in the second aspect.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to describe technical solutions of embodiments of the presentdisclosure more clearly, drawings used in the description of theembodiments of the present disclosure are briefly illustrated below.Obviously, the drawings in the following description are just someembodiments of the present disclosure. For those of ordinary skill inthe art, other drawings can be obtained based on these drawings withoutcreative effort.

FIG. 1 is a second flowchart of a method for controlling activation of aBWP according to an embodiment of the present disclosure;

FIG. 2 is a second flowchart of a method for controlling activation of aBWP according to an embodiment of the present disclosure;

FIG. 3 is a third flowchart of a method for controlling activation of aBWP according to an embodiment of the present disclosure;

FIG. 4 is a fourth flowchart of a method for controlling activation of aBWP according to an embodiment of the present disclosure;

FIG. 5 is a flowchart of a method for controlling activation of a BWPaccording to another embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a user equipment accordingto an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a base station according toan embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of an electronic deviceaccording to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of an electronic deviceaccording to another embodiment of the present disclosure; and

FIG. 10 is a schematic structural diagram of a base station according toanother embodiment of the present disclosure.

DETAILED DESCRIPTION

Technical solutions in embodiments of the present disclosure will beclearly and completely described below with reference to theaccompanying drawings in the embodiments of the present disclosure.Obviously, the described embodiments are part of the embodiments of thepresent disclosure, but not all of the embodiments. Based on theembodiments in the present disclosure, many other embodiments obtainedby a person of ordinary skill in the art without creative efforts shallfall within the protection scope of the present disclosure.

Reference is made to FIG. 1 , which is a flowchart of a method forcontrolling activation of a bandwidth part (BWP) according to anembodiment of the present disclosure. As shown in FIG. 1 , the methodincludes the following steps 101 to 103.

Step 101 includes: receiving and saving BWP configuration informationtransmitted by a base station, where the BWP configuration informationincludes BWP identification information.

The method for controlling activation of a BWP provided by embodimentsof the present disclosure is applied in a user equipment (UE) to managean activated state of BWP(s) corresponding to each component carrier.

In this step, the base station first configures a BWP for a UE to accessthe base station. When configuring the BWP, the base station transmitsthe BWP configuration information to the UE, and the UE may receive andsave the BWP configuration information, i.e., saving a correspondencebetween each component carrier and a default BWP. Specifically, in apractical application, each component carrier is configured with a BWPset, and information about one or more BWPs is stored in the BWP set,that is, one component carrier may correspond to one or more BWPs. In anembodiment, every BWPs may be numbered.

The BWP identification information may be configured to a UE in anexplicit or implicit manner.

The explicit manner includes that a dedicated information bit string isconfigured in the configuration information for each BWP to indicateindex information of the BWP.

The implicit manner includes that a serial number of each BWP in a BWPlist of the configuration information is an index of the BWP. As anexample, the first BWP in the list is numbered as 0, and BWPs subsequentto the first BWP are respectively numbered as 1, 2, 3, and so on.

Step 102 includes: receiving a BWP activation command transmitted by thebase station.

The base station may transmit a BWP activation command to the basestation through Layer 1 (L1) signaling or Layer 2 (L2) signaling, andthe BWP activation command may indicate index information ofto-be-activated BWP(s) in an explicit or implicit manner.

The explicit manner includes: carrying index information of a target andto-be-activated BWP in an activation signaling.

The implicit manner includes: carrying a bitmap in an activationsignaling, each bit corresponding to one BWP, indicating to activate theBWP when the corresponding bit takes a first value; and indicating todeactivate the BWP when the corresponding bit takes a second value. Aposition where each indication bit is located in the bitmap correspondsto an index of a corresponding BWP. As an example, the first bit in thebitmap corresponds to a BWP numbered as 0, the second bit in the bitmapcorresponds to a BWP numbered as 1, and so on. In a case that a BWP isin an activated state, no operation is performed when a bitcorresponding to the BWP in the received activation signaling takes afirst value. Similarly, in a case that a BWP is in a deactivated state,no operation is performed when a bit corresponding to the BWP in thereceived activation signaling takes a second value.

Step 103 includes: performing BWP activation with a BWP identifierindicated by the BWP activation command.

Upon receipt of the BWP activation command, a UE may perform BWPactivation with the BWP identifier indicated by the BWP activationcommand, thereby implementing a control of BWP activation.

Thus, in the embodiment of the present disclosure, BWP configurationinformation transmitted by a base station is received and saved, and theBWP configuration information includes BWP identification information; aBWP activation command transmitted by the base station is received; anda BWP is activated based on a BWP identifier indicated by the BWPactivation command BWPs are numbered, the activation command indicates aBWP that needs to be activated, and the BWP is activated by a UE,thereby improving the flexibility of BWP activation control.

Reference is further made to FIG. 2 , and the above-mentioned BWPconfiguration information is used to indicate a default BWPcorresponding to each component carrier. Subsequent to step 101, themethod further includes:

-   -   step 104, receiving a component carrier activation signaling        transmitted by the base station; and    -   step 105, activating, based on the component carrier activation        signaling, a first target component carrier and a default BWP        corresponding to the first target component carrier.

In a case that a component carrier is activated, data can be normallytransmitted and received on the component carrier only when there is anactivated BWP on the component carrier. The above-mentioned default BWPrefers to a BWP that needs to be activated by default, if a commandindicates to activate a component carrier, but the command does notspecify a BWP on the component carrier requiring to be activated. Thenumber of the default BWP corresponding to each component carrier may beset according to actual needs, and may be one or more, which is notspecifically limited herein.

It should be appreciated that when a target component carrier is in adeactivated state, all BWPs on this component carrier are in adeactivated state. In this step, the base station may transmit acomponent carrier activation signaling to the base station by a controlelement (CE) of a medium access control (MAC) layer. The componentcarrier activation signaling carries a first target component carrierthat needs to be activated, and all BWPs on the first target componentcarrier are in a deactivated state.

After receiving the component carrier activation signaling, the UEobtains the first target component carrier that needs to be activated,which is indicated by the component carrier activation signaling, thenobtains a default BWP corresponding to the first target componentcarrier according to the previously stored BWP configurationinformation, and finally activates the first target component carrierand the default BWP(s) corresponding to the first target componentcarrier.

In this embodiment, a default BWP corresponding to each componentcarrier is configured in BWP configuration information, and then a firsttarget component carrier and a default BWP corresponding to a firsttarget component carrier are directly activated based on the componentcarrier activation signaling. Therefore, an activated state of thecomponent carrier and an activated state of a BWP on the componentcarrier can be controlled through a single signaling, thereby reducingsignaling overhead. In addition, since a single signaling is used tosimultaneously activate a component carrier and activate a BWP on thecomponent carrier, a transmission delay can be avoided, which is causedby controlling an activated state of the component carrier and anactivated state of the BWP on the component carrier through separatesignalings.

It should be appreciated that a manner where a base station configuresBWP configuration information for indicating a default BWP correspondingto each component carrier can be set according to actual needs. Forexample, in an embodiment, the configuring manner can be implemented inany of the following manners:

-   -   a first manner including that, for a component carrier        configured with a BWP set, one bit is used to indicate whether        each BWP in the BWP set is the default BWP;    -   a second manner including that, for a component carrier        configured with a BWP set, a BWP ranked first or last in the BWP        set is the default BWP;    -   a third manner including that, for a component carrier        configured with a BWP set, each BWP has an index value, and a        BWP with an initial index value in the BWP set is the default        BWP; for example, if the BWP identifier value in a BWP set        starts from 0, a BWP with the index value 0 is determined as a        default BWP;    -   a fourth manner including that, for a component carrier        configured with a BWP set, a BWP with the widest or narrowest        bandwidth in BWPs in the BWP set is the default BWP; or    -   a fifth manner including that, for a component carrier        configured with a BWP set, a BWP with the lowest or highest        starting frequency in BWPs in the BWP set is the default BWP.

Further, after the base station transmits the BWP configurationinformation, the activated BWP may be deactivated based on signaling.Specifically, referring to FIG. 3 , subsequent to the above step 101,the method further includes steps 106 and 107.

Step 106 includes: receiving a BWP deactivation command transmitted bythe base station, where the BWP deactivation command is configured toadjust an activated BWP on a second target component carrier to adeactivated state.

In this step, the base station may transmit a BWP deactivation commandto a UE through L1 or L2 signaling. The signaling may include anidentification indication of a BWP that needs to be deactivated. The UEmay obtain the second target component carrier where the BWP needs to bedeactivated is located, by inquiring the previously saved BWPconfiguration information.

Step 107 includes: deactivating the second target component carrier, ordeactivating the second target component carrier and a corresponding BWPon the second target component carrier, in a case that an activated BWPto be adjusted on the second target component carrier is a lastactivated BWP.

In this step, when an deactivation operation is performed on a BWP onthe second target component carrier, in a case that there are multipleactivated BWPs on the second target component carrier, a BWP specifiedin the BWP deactivation command may be directly deactivated; and in acase that only the last activated BWP exists on the second targetcomponent carrier, the second target component carrier may bedeactivated, or both the second target component carrier and acorresponding BWP (that is, a BWP specified in the deactivation command)on the second target component carrier. In addition, in a case that aBWP specified in the BWP deactivation command includes all activatedBWPs on the second target component carrier, which also means performinga deactivation on the last activated BWP on the second target componentcarrier, the second target component carrier may be deactivated in thiscase, or both the second target component carrier and a correspondingBWP on the second target component carrier (that is, a BWP specified inthe deactivation command) may be deactivated in this case. Since thedeactivation of a component carrier can be achieved by only indicating aBWP deactivation during a deactivation process, the signaling overheadis further reduced.

Further, after the base station transmits the BWP configurationinformation, the activated BWP may be deactivated in accordance with asignaling. Specifically, referring to FIG. 4 , subsequent to the abovestep 101, the method further includes steps 108 and 109.

Step 108 includes: receiving a component carrier deactivation signalingtransmitted by the base station.

In this step, the base station may transmit a component carrierdeactivation signaling to a UE through a control element of a mediumaccess control layer (MAC CE). The component carrier deactivationsignaling includes a third target component carrier that needs to bedeactivated. The UE may obtain all BWPs on the third target componentcarrier based on the previously saved BWP configuration information. Thethird target component carrier may include one or more BWPs in anactivated state, and may also include one or more BWPs in a deactivatedstate.

Step 109 includes: deactivating, based on the component carrierdeactivation signaling, a third target component carrier, or a thirdtarget component carrier and all activated BWPs on the third targetcomponent carrier.

In this step, upon receiving the component carrier deactivationsignaling, a UE may deactivate the third target component carrier, ormay deactivate the third target component carrier and all the activatedBWPs on the third target component carrier. Since the deactivation of aBWP can be achieved only based on a component carrier deactivationsignaling, the signaling overhead is further reduced.

Further, the BWP activation command is configured to adjust adeactivated BWP on a fourth target component carrier to an activatedstate. The performing BWP activation with the BWP identifier indicatedby the BWP activation command includes: activating the fourth targetcomponent carrier and a BWP designated to be activated through the BWPactivation command, in a case that the fourth target component carrieris in a deactivated state.

In an embodiment, the base station may transmit a BWP activation commandto a UE through L1 signaling or L2 signaling, and the BWP activationcommand includes a BWP that needs to be activated. The UE may obtain thefourth target component carrier corresponding to the BWP(s) that needsto be activated by inquiring the previously saved BWP configurationinformation.

The UE determines whether the fourth target component carrier is in anactivated state, may directly activate a BWP designated to be activatedthrough the BWP activation command if the fourth target componentcarrier is currently in an activated state, and may activate the fourthtarget component carrier and a BWP designated to be activated throughthe BWP activation command if the fourth target component carrier iscurrently in a deactivated state. In this embodiment, a componentcarrier can be controlled to be activated only through a BWP activationcommand, thereby further reducing the signaling overhead.

It should be noted that in the related art, a UE usually accesses toonly one base station, and of course, a UE can also access to two basestations, where one of the base stations is a primary base station andthe other one is a secondary base station. In an embodiment, theforegoing BWP configuration information may include BWP configurationinformation of the primary base station and BWP configurationinformation of the secondary base station. In a case that a secondarybase station needs to be added to the UE, the primary base stationconfigures BWP configuration information of the secondary base stationfor the UE. In this case, when the UE receives the BWP configurationinformation of the secondary base station, the BWP configurationinformation of the secondary base station is used to indicate acomponent carrier where a primary cell of the secondary base station islocated, and default BWP information corresponding to each componentcarrier. Subsequent to the above step 101, the above method furtherincludes: actively activating, by the UE, a default BWP corresponding tothe component carrier where the primary cell in the secondary basestation is located.

In this embodiment, after receiving the BWP configuration information ofthe secondary base station, the UE may activate the default BWPcorresponding to the component carrier where the primary cell in thesecondary base station is located in accordance with indications,thereby implementing data transmission to the secondary base station. Itshould be understood that for processes of activating and deactivating aBWP corresponding to a component carrier where a secondary cell in thesecondary base station is located and a non-default BWP corresponding toa component carrier where a primary cell in the secondary base stationis located, reference can be made to the foregoing embodiments, anddetails are not described herein again.

Further, the base station may further perform handover on the primarycell. Specifically, subsequent to the above step 101, the method furtherincludes:

-   -   receiving a primary cell handover command transmitted by the        base station, where the primary cell handover command is        configured to indicate a target primary cell as a handover cell        and a default BWP on the target primary cell; and    -   performing a cell handover based on the default BWP on the        target primary cell and the target primary cell, for example,        performing a random access procedure on the default BWP of the        target primary cell.

In this embodiment, a base station can control a UE to be switched to atarget primary cell through a primary cell handover command, so as tosupply a better service to the UE. In order to enable normal datatransmission on the target primary cell, a default BWP on the targetprimary cell is indicated in the primary cell handover commandTherefore, the UE can complete the subsequent target cell handoverprocedure on the default BWP.

Reference is made to FIG. 5 , and the present disclosure furtherprovides a method for controlling activation of a bandwidth part (BWP),which includes steps 501 and 502.

Step 501 includes: transmitting BWP configuration information to a UE,where the BWP configuration information includes BWP identificationinformation.

The method for controlling activation of a BWP provided by embodimentsof the present disclosure is applied in a base station to control anactivated state of BWP(s) corresponding to each component carrier.

In this step, the base station first configures a BWP for a UE to accessthe base station. When configuring the BWP, the base station transmitsthe BWP configuration information to the UE, and the UE may receive andsave the BWP configuration information, thereby saving a correspondencebetween each component carrier and a default BWP. Specifically, in apractical application, each component carrier is configured with a BWPset, and information about one or more BWPs is stored in the BWP set,that is, one component carrier may correspond to one or more BWPs. In anembodiment, all the BWPs may be numbered.

The BWP identification information may be configured to a UE in anexplicit or implicit manner.

The explicit manner includes that a dedicated information bit string isconfigured in the configuration information for each BWP to indicateindex information of the BWP.

The implicit manner includes that a serial number of each BWP in a BWPlist of the configuration information is an index of the BWP. As anexample, the first BWP in the list is numbered as 0, and BWPs subsequentto the first BWP are respectively numbered as 1, 2, 3, and so on.

Step 502 includes: transmitting a BWP activation command to the UE,where the activation command is configured for the UE to perform BWPactivation with a BWP identifier indicated by the BWP activationcommand.

The base station may transmit a BWP activation command to the UE throughL1 signaling or L2 signaling, and the BWP activation command mayindicate index information of to-be-activated BWP(s) in an explicit orimplicit manner.

The explicit manner includes: carrying index information of a target andto-be-activated BWP in an activation signaling.

The implicit manner includes: carrying a bitmap in an activationsignaling, each bit corresponding to one BWP, indicating to activate theBWP when the corresponding bit takes a first value; and indicating todeactivate the BWP when the corresponding bit takes a second value. Aposition where each indication bit is located in the bitmap correspondsto an index of a corresponding BWP. As an example, the first bit in thebitmap corresponds to a BWP numbered as 0, the second bit in the bitmapcorresponds to a BWP numbered as 1, and so on. In a case that a BWP isin an activated state, no operation is performed when a bitcorresponding to the BWP in the received activation signaling takes afirst value. Similarly, in a case that a BWP is in a deactivated state,no operation is performed when a bit corresponding to the BWP in thereceived activation signaling takes a second value.

When receiving the BWP activation command, a UE may perform BWPactivation with the BWP identifier indicated by the BWP activationcommand, thereby implementing a control of BWP activation.

Thus, in the embodiment of the present disclosure, BWP configurationinformation transmitted by a base station is received and saved, wherethe BWP configuration information includes BWP identificationinformation; a BWP activation command transmitted by the base station isreceived; and BWP activation is performed based on a BWP identifierindicated by the BWP activation command BWPs are numbered, theactivation command indicates a BWP that needs to be activated, and theBWP is activated by a UE, thereby improving the flexibility of BWPactivation control.

Further, the BWP configuration information is used to indicate a defaultBWP corresponding to each component carrier. After transmitting the BWPconfiguration information to the user equipment, the method furtherincludes: transmitting a component carrier activation signaling to theuser equipment, where the component carrier activation signaling is usedfor the user equipment to activate a first target component carrier anda default BWP corresponding to the first target component carrier.

When a component carrier is activated, data can be normally transmittedand received on the component carrier only when there is an activatedBWP on the component carrier. The above-mentioned default BWP refers toa BWP that needs to be activated by default when a command indicates toactivate a BWP, but the command does not indicate that other BWPs on thecomponent carrier require to be activated. The number of the defaultBWPs corresponding to each component carrier may be set according toactual demands, and may be one or more, which is not specificallylimited herein.

It should be appreciated that when a target component carrier is in adeactivated state, all BWPs on the target component carrier are in adeactivated state. In this step, the base station may transmit acomponent carrier activation signaling to the base station by an MAC CE.The component carrier activation signaling carries a first targetcomponent carrier that needs to be activated, and all BWPs on the firsttarget component carrier are in a deactivated state.

After receiving the component carrier activation signaling, the UEobtains the first target component carrier that needs to be activated,which is indicated by the component carrier activation signaling, thenobtains a default BWP corresponding to the first target componentcarrier according to the previously stored BWP configurationinformation, and finally activates the first target component carrierand the default BWP(s) corresponding to the first target componentcarrier.

In this embodiment, a default BWP corresponding to each componentcarrier is configured in BWP configuration information, and then a firsttarget component carrier and a default BWP corresponding to a firsttarget component carrier are directly activated in accordance with thecomponent carrier activation signaling. Therefore, an activated state ofthe component carrier and an activated state of a BWP on the componentcarrier can be controlled through a single signaling, thereby reducingsignaling overhead. In addition, since a single signaling is used toactivate a component carrier and activate a BWP on the component carrierat a same time, a transmission delay can be avoided, which is caused bycontrolling an activated state of the component carrier and an activatedstate of the BWP on the component carrier through separate signalings.

It should be appreciated that a manner where a base station configuresBWP configuration information for indicating a default BWP correspondingto each component carrier can be set according to actual needs. Forexample, in an embodiment, the configuring manner can be implemented inany of the following manners:

-   -   a first manner including that, for a component carrier        configured with a BWP set, one bit is used to indicate whether        each BWP in the BWP set is the default BWP;    -   a second manner including that, for a component carrier        configured with a BWP set, a BWP ranked first or last in the BWP        set is the default BWP;    -   a third manner including that, for a component carrier        configured with a BWP set, each BWP has an index value, and a        BWP with an initial index value in the BWP set is the default        BWP; for example, if the BWP identifier value in a BWP set        starts from 0, a BWP with the index value 0 is determined as a        default BWP;    -   for a component carrier configured with a BWP set, a BWP with a        maximum bandwidth or a minimum bandwidth in the BWP set is the        default BWP; or    -   for a component carrier configured with a BWP set, a BWP with a        maximum starting frequency or a minimum starting frequency in        the BWP set is the default BWP.

Further, after the base station transmits the BWP configurationinformation, the activated BWP may be deactivated through signaling.Specifically, subsequent to the above step 501, the method furtherincludes: transmitting a BWP deactivation command to the user equipment.The BWP deactivation command is configured to instruct the userequipment to adjust an activated BWP on a second target componentcarrier to a deactivated state; and the BWP deactivation command isconfigured to instruct the user equipment to deactivate the secondtarget component carrier, or deactivate the second target componentcarrier and a corresponding BWP on the second target component carrier,in a case that the activated BWP to be adjusted is a last activated BWPon the second target component carrier.

In this step, the base station may transmit a BWP deactivation commandto a UE through L1 or L2 signaling, which may include a BWP that needsto be deactivated. The UE may obtain the second target component carrierwhere the BWP needs to be deactivated is located, by inquiringpreviously saved BWP configuration information.

In an embodiment, when a UE performs deactivation on a BWP on the secondtarget component carrier, in a case that there are multiple activatedBWPs on the second target component carrier, the UE may directlydeactivate a BWP specified in the BWP deactivation command; and in acase that only the last activated BWP exists on the second targetcomponent carrier, the UE may deactivate the second target componentcarrier, or both the second target component carrier and a correspondingBWP (that is, a BWP specified in the deactivation signaling) on thesecond target component carrier. Since the deactivation of a componentcarrier can be achieved by only indicating a BWP deactivation during adeactivation process, the signaling overhead is further reduced.

Further, after the base station transmits the BWP configurationinformation, the activated BWP may be deactivated through signaling.Specifically, subsequent to the above step 501, the method furtherincludes: transmitting a component carrier deactivation signaling to theuser equipment. The component carrier deactivation signaling isconfigured to instruct the user equipment to deactivate a third targetcomponent carrier, or to instruct the user equipment to deactivate athird target component carrier and all activated BWPs on the thirdtarget component carrier.

In this step, the base station may transmit a component carrierdeactivation signaling to a UE through a control element of a mediumaccess control layer (MAC CE). The component carrier deactivationsignaling includes a third target component carrier that needs to bedeactivated. The UE may obtain all BWPs on the third target componentcarrier based on the previously saved BWP configuration information. Thethird target component carrier may include one or more BWPs in anactivated state, and may also include one or more BWPs in a deactivatedstate.

In this embodiment, upon receiving the component carrier deactivationsignaling, a UE may deactivate the third target component carrier, ormay deactivate the third target component carrier and all the activatedBWPs on the third target component carrier. Since the deactivation of aBWP can be achieved only based on a component carrier deactivationsignaling, the signaling overhead is further reduced.

Further, the BWP activation command is configured to adjust adeactivated BWP on a fourth target component carrier to an activatedstate; and the user equipment activates the fourth target componentcarrier and a BWP designated to be activated through the BWP activationcommand, in a case that the fourth target component carrier is in aninactive state.

In this step, the base station may transmit a BWP activation command toa UE through L1 signaling or L2 signaling, and the BWP activationcommand includes a BWP that needs to be activated. The UE may obtain thefourth target component carrier corresponding to the BWP(s) that needsto be activated by inquiring the previously saved BWP configurationinformation.

The UE determines whether the fourth target component carrier is in anactivated state, may directly activate a BWP designated to be activatedthrough the BWP activation command if the fourth target componentcarrier is currently in an activated state, and may activate the fourthtarget component carrier and a BWP designated to be activated throughthe BWP activation command if the fourth target component carrier iscurrently in a deactivated state. In this embodiment, a componentcarrier can be controlled to be activated only through a BWP activationcommand, thereby further reducing the signaling overhead.

It should be noted that in the related art, a UE usually accesses toonly one base station, and of course, a UE can also access to two basestations, where one of the base stations is a primary base station andthe other one is a secondary base station. In an embodiment, theforegoing BWP configuration information may include BWP configurationinformation of the primary base station and BWP configurationinformation of the secondary base station. In a case that a secondarybase station needs to be added to the UE, the primary base stationconfigures BWP configuration information of the secondary base stationfor the UE. The BWP configuration information of the secondary basestation is used to indicate a component carrier where a primary cell ofthe secondary base station is located, and default BWP informationcorresponding to each component carrier.

In an embodiment, after receiving the BWP configuration information ofthe secondary base station, the UE may activate the default BWPcorresponding to the component carrier where the primary cell of thesecondary base station is located based on an indication, therebyimplementing data transmission of the secondary base station. It shouldbe understood that, for processes of activating and deactivating a BWPcorresponding to a component carrier where a secondary cell in thesecondary base station is located, and a non-default BWP correspondingto a component carrier where a primary cell in the secondary basestation is located, reference can be made to the foregoing embodiments,and details are not described herein again.

Further, the base station may also perform handover on the primary cell.Specifically, subsequent to the above step 101, the method furtherincludes: transmitting a primary cell handover command to the userequipment, where the primary cell handover command is configured toindicate a target primary cell as a handover cell and a default BWP onthe target primary cell.

In this embodiment, a base station can control a UE to be switched to atarget primary cell through a primary cell handover command, so as tosupply a better service to the UE. In order to enable normal datatransmission on the target primary cell, a default BWP on the targetprimary cell is indicated in the primary cell handover commandTherefore, the UE can complete the subsequent target cell handoverprocedure on the default BWP.

Reference is made to FIG. 6 , which is a schematic structural diagram ofa UE according to an embodiment of the present disclosure, which canimplement details of the method for controlling activation of abandwidth part (BWP) in the foregoing embodiments, and can achieve thesame effects. As shown in FIG. 6 , the UE includes:

-   -   a configuration reception module 601, configured to receive and        save BWP configuration information transmitted by a base        station, where the BWP configuration information includes BWP        identification information;    -   a command reception module 602, configured to receive a BWP        activation command transmitted by the base station; and    -   a processing module 603, configured to perform BWP activation        with a BWP identifier indicated by the BWP activation command.

Optionally, the BWP configuration information is used to indicate adefault BWP corresponding to each component carrier. The commandreception module 602 is further configured to receive a componentcarrier activation signaling transmitted by the base station. Theprocessing module 603 is further configured to activate, based on thecomponent carrier activation signaling, a first target component carrierand a default BWP corresponding to the first target component carrier.

Optionally, a manner where the BWP configuration information indicatesthe default BWP corresponding to each component carrier includes any ofthe following manners:

-   -   a manner in which, for a component carrier configured with a BWP        set, one bit is used to indicate whether each BWP in the BWP set        is the default BWP;    -   a manner in which, for a component carrier configured with a BWP        set, a BWP ranked first or last in the BWP set is the default        BWP;    -   a manner in which, for a component carrier configured with a BWP        set, each BWP has an index value, and a BWP with an initial        index value in the BWP set is the default BWP;    -   a manner in which, for a component carrier configured with a BWP        set, a BWP with a maximum bandwidth or a minimum bandwidth in        the BWP set is the default BWP; or    -   a manner in which, for a component carrier configured with a BWP        set, a BWP with a maximum starting frequency or a minimum        starting frequency in the BWP set is the default BWP.    -   Optionally, the command reception module 602 is further        configured to receive a BWP deactivation command transmitted by        the base station, and the BWP deactivation command is configured        to adjust an activated BWP on a second target component carrier        to a deactivated state. The processing module 603 is further        configured to deactivate the second target component carrier, or        deactivate the second target component carrier and a        corresponding BWP on the second target component carrier, in a        case that the activated BWP to be adjusted is a last activated        BWP on the second target component carrier.

Optionally, the command reception module 602 is further configured toreceive a component carrier deactivation signaling transmitted by thebase station. The processing module 603 is further configured todeactivate, based on the component carrier deactivation signaling, athird target component carrier, or a third target component carrier andall activated BWPs on the third target component carrier.

Optionally, the BWP activation command is configured to adjust adeactivated BWP on a fourth target component carrier to an activatedstate. The processing module 603 is further configured to activate thefourth target component carrier and a BWP designated to be activatedthrough the BWP activation command, in a case that the fourth targetcomponent carrier is in an inactive state.

Optionally, the command reception module 602 is further configured to:receive BWP configuration information of a secondary base station, andthe BWP configuration information of the secondary base station is usedto indicate a component carrier where a primary cell of the secondarybase station is located, and default BWP information corresponding toeach component carrier. The processing module 603 is further configuredto activate a default BWP corresponding to the component carrier wherethe primary cell of the secondary base station is located.

Optionally, the command reception module 602 is further configured toreceive a primary cell handover command transmitted by the base station,and the primary cell handover command is configured to indicate a targetprimary cell as a handover cell and a default BWP on the target primarycell. The processing module 603 is further configured to perform a cellhandover based on the default BWP on the target primary cell and thetarget primary cell.

Thus, in the embodiments of the present disclosure, BWP configurationinformation transmitted by a base station is received and saved, wherethe BWP configuration information includes BWP identificationinformation; a BWP activation command transmitted by the base station isreceived; and a BWP is activated based on a BWP identifier indicated bythe BWP activation command BWPs are numbered, the activation commandindicates a BWP that needs to be activated, and the BWP is activated bya UE, thereby improving the flexibility of BWP activation control.

Referring to FIG. 7 , FIG. 7 is a schematic structural diagram of a basestation according to an embodiment of the present disclosure, which canimplement details of the method for controlling activation of abandwidth part (BWP) in the foregoing embodiments, and can achieve thesame effects. As shown in FIG. 7 , the base station includes:

-   -   a configuration transmission module 701, configured to transmit        BWP configuration information to a user equipment, where the BWP        configuration information includes BWP identification        information; and    -   a command transmission module 702, configured to transmit a BWP        activation command to the user equipment, where the BWP        activation command is configured for the user equipment to        perform BWP activation with a BWP identifier indicated by the        BWP activation command.

Optionally, the BWP configuration information is used to indicate adefault BWP corresponding to each component carrier. The commandtransmission module is further configured to transmit a componentcarrier activation signaling to the user equipment, where the componentcarrier activation signaling is used for the user equipment to activatea first target component carrier and a default BWP corresponding to thefirst target component carrier.

Optionally, the BWP configuration information indicates a default BWPcorresponding to each component carrier as follows:

-   -   for a component carrier configured with a BWP set, one bit is        used to indicate whether each BWP in the BWP set is the default        BWP;    -   for a component carrier configured with a BWP set, a BWP ranked        first or last in the BWP set is the default BWP;    -   for a component carrier configured with a BWP set, each BWP has        an index value, and a BWP with an initial index value in the BWP        set is the default BWP;    -   for a component carrier configured with a BWP set, a BWP with a        maximum or minimum bandwidth in the BWP set is the default BWP;        or    -   for a component carrier configured with a BWP set, a BWP with a        maximum or minimum starting frequency in the BWP set is the        default BWP.

Optionally, the command transmission module 702 is further configured totransmit a BWP deactivation command to the user equipment. The BWPdeactivation command is configured to instruct the user equipment toadjust an activated BWP on a second target component carrier to adeactivated state; and the BWP deactivation command is configured toinstruct the user equipment to deactivate the second target componentcarrier, or to deactivate the second target component carrier and acorresponding BWP on the second target component carrier, in a case thatthe activated BWP to be adjusted is a last activated BWP on the secondtarget component carrier.

Optionally, the command transmission module 702 is further configured totransmit a component carrier deactivation signaling to the userequipment, and the component carrier deactivation signaling isconfigured to instruct the user equipment to deactivate a third targetcomponent carrier, or to deactivate a third target component carrier andall activated BWPs on the third target component carrier.

Optionally, the BWP activation command is configured to adjust adeactivated BWP on a fourth target component carrier to an activatedstate; and the BWP activation command is configured to instruct the userequipment to activate the fourth target component carrier and a BWPdesignated to be activated through the BWP activation command, in a casethat the fourth target component carrier is in an inactive state.

Optionally, the BWP configuration information includes BWP configurationinformation of a primary base station and BWP configuration informationof a secondary base station; and the BWP configuration information ofthe secondary base station is used to indicate a component carrier wherea primary cell of the secondary base station is located, and default BWPinformation corresponding to each component carrier.

Optionally, the command transmission module 702 is further configured totransmit a primary cell handover command to the user equipment, and theprimary cell handover command is configured to indicate a target primarycell as a handover cell and a default BWP on the target primary cell.

In view of the above, in the embodiments of the present disclosure, BWPconfiguration information transmitted by a base station is received andsaved, where the BWP configuration information includes BWPidentification information; a BWP activation command transmitted by thebase station is received; and a BWP is activated based on a BWPidentifier indicated by the BWP activation command BWPs are numbered,the activation command indicates a BWP that needs to be activated, andthe BWP is activated by a UE, thereby improving the flexibility of BWPactivation control.

Reference is made to FIG. 8 , which is a schematic structural diagram ofa UE according to an embodiment of the present disclosure, which canimplement details of the method for controlling activation of abandwidth part (BWP) in the foregoing embodiments, and can achieve thesame effects. As shown in FIG. 8 , the UE 800 includes: at least oneprocessor 801, a memory 802, at least one network interface 804, and auser interface 803. Various modules in the UE 800 are coupled togetherthrough a bus system 805. It is understandable that the bus system 805is configured to implement connections and communications between thesecomponents. The bus system 805 includes a power bus, a control bus, anda signal status bus in addition to a data bus. However, for the sake ofclarity, various buses are denoted by the bus system 805 in FIG. 13 .

The user interface 803 may include a display, a keyboard, or a clickdevice (for example, a mouse, a track ball, a touch pad, or a touchscreen).

It can be understood that the memory 802 in the embodiments of thepresent disclosure may be a volatile memory or a non-volatile memory, ormay include both the volatile memory and the non-volatile memory. Thenon-volatile memory may be a read-only memory (ROM), a programmable ROM(PROM), an erasable PROM (EPROM), an electrically EPROM (EEPROM) or aflash memory. The volatile storage may be a random access memory (RAM),which is used as an external cache. By way of example and without anylimitation, many forms of RAMs may be used, such as static RAM (SRAM),dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM(DDRSDRAM), enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM) and directRambus RAM (DRRAM). The memory 802 of the system and method described inthis specification is meant to include, without limitation, these andany other suitable types of memories.

In some implementations, the memory 802 stores the following elements,an executable module or a data structure, or a subset or extension setthereof, such as an operating system 8021 and an application 8022.

The operating system 8021 includes various system programs, such as aframework layer program, a core library layer program and a driver layerprogram, to implement various fundamental services and processhardware-based tasks. The application 8022 includes variousapplications, such as a media player and a browser, to implement avariety of application services. The program implementing the methodaccording to embodiments of the present disclosure may be included inthe application 8022.

In an embodiment of the present disclosure, the UE further includes acomputer program stored in the memory 802 and executable on theprocessor 801, which may be specifically the computer program in theapplication 8022. The computer program is executed by the processor 801to implement the following steps:

-   -   receiving and saving BWP configuration information transmitted        by a base station, where the BWP configuration information        includes BWP identification information;    -   receiving a BWP activation command transmitted by the base        station; and    -   performing BWP activation with a BWP identifier indicated by the        BWP activation command.

The methods disclosed in the foregoing embodiments of the presentdisclosure may be applied in the processor 801 or implemented by theprocessor 801. The processor 801 may be an integrated circuit chip withsignal processing capabilities. During an implementation process, stepsof the methods may be realized in form of hardware by integrated logicalcircuits in the processor 801, or in form of software by instructions.The processor 801 may be a general purpose processor, a digital signalprocessor (DSP), an application specific integrated circuit (ASIC), afield programmable gate array (FPGA) or other programmable logicdevices, a discrete gate or a transistor logic component, a discretehardware transistor logic component, discrete hardware assembly, that iscapable of implementing or executing the various methods, steps andlogic block diagrams disclosed in the embodiments of the presentdisclosure. The general purpose processor may be a microprocessor, orany conventional processor, etc. The steps of the methods disclosed withreference to the embodiments of the present disclosure may be embodiedin hardware in the form of a coding processor, or performed by thehardware in the coding processor and the software modules incombination. The software modules may reside in well-established storagemedium in the art, such as a RAM, flash memory, ROM, PROM or EEPROM,register, etc. The storage medium resides in the memory 802. Theprocessor 801 reads information from the memory 802 and performs thesteps of the methods in combination with its hardware.

It is understood that, the embodiments described in the presentdisclosure may be implemented by hardware, software, firmware,middleware, microcode or a combination thereof. For hardwareimplementation, processing units may be implemented in one or moreapplication specific integrated circuits (ASIC), digital signalprocessor (DSP), DSP device (DSPD), programmable logic device (PLD),field-programmable gate array (FPGA), general purpose processor,controller, microcontroller, microprocessor, other electronic unitconfigured to perform the function described in this specification or acombination thereof.

For software implementation, the technical solutions described in theembodiments of the present disclosure may be implemented by a module(e.g., process, or function, etc.) configured to perform the functionsdescribed in the embodiments of the present disclosure. Software codesmay be stored in a memory and executed by the processor. The memory maybe implemented internal or external to the processor.

Optionally, the BWP configuration information is used to indicate adefault BWP corresponding to each component carrier, and the computerprogram is executed by the processor 801 to further implement thefollowing steps:

-   -   receiving a component carrier activation signaling transmitted        by the base station; and    -   activating, based on the component carrier activation signaling,        a first target component carrier and a default BWP corresponding        to the first target component carrier.

Optionally, a manner where the BWP configuration information indicatesthe default BWP corresponding to each component carrier includes any ofthe following manners:

-   -   for a component carrier configured with a BWP set, one bit is        used to indicate whether each BWP in the BWP set is the default        BWP;    -   for a component carrier configured with a BWP set, a BWP ranked        first or last in the BWP set is the default BWP;    -   for a component carrier configured with a BWP set, each BWP has        an index value, and a BWP with an initial index value in the BWP        set is the default BWP;    -   for a component carrier configured with a BWP set, a BWP with a        maximum bandwidth or a minimum bandwidth in the BWP set is the        default BWP; or    -   for a component carrier configured with a BWP set, a BWP with a        maximum starting frequency or a minimum starting frequency in        the BWP set is the default BWP.

Optionally, the computer program is executed by the processor 801 tofurther implement the following steps:

-   -   receiving a BWP deactivation command transmitted by the base        station, where the BWP deactivation command is configured to        adjust an activated BWP on a second target component carrier to        a deactivated state; and    -   deactivating the second target component carrier, or        deactivating the second target component carrier and a        corresponding BWP on the second target component carrier, in a        case that the activated BWP to be adjusted on the second target        component carrier is a last activated BWP.

Optionally, the computer program is executed by the processor 801 tofurther implement the following steps:

-   -   receiving a component carrier deactivation signaling transmitted        by the base station; and    -   deactivating, based on the component carrier deactivation        signaling, a third target component carrier, or a third target        component carrier and all activated BWPs on the third target        component carrier.

Optionally, the BWP activation command is configured to adjust adeactivated BWP on a fourth target component carrier to an activatedstate; and the fourth target component carrier and a BWP designated tobe activated through the BWP activation command is activated, in a casethat the fourth target component carrier is in an inactive state.

Optionally, the BWP configuration information includes BWP configurationinformation of a primary base station and BWP configuration informationof a secondary base station; and when the BWP configuration informationof the secondary base station is received, the BWP configurationinformation of the secondary base station is used to indicate acomponent carrier where a primary cell of the secondary base station islocated, and default BWP information corresponding to each componentcarrier. The computer program is executed by the processor 801 tofurther implement the following steps: activating a default BWPcorresponding to the component carrier where the primary cell of thesecondary base station is located.

Optionally, the computer program is executed by the processor 801 tofurther implement the following steps:

-   -   receiving a primary cell handover command transmitted by the        base station, where the primary cell handover command is        configured to indicate a target primary cell as a handover cell        and a default BWP on the target primary cell; and    -   performing a cell handover based on the default BWP on the        target primary cell and the target primary cell.

In view of the above, in the embodiments of the present disclosure, BWPconfiguration information transmitted by a base station is received andsaved, where the BWP configuration information includes BWPidentification information; a BWP activation command transmitted by thebase station is received; and a BWP is activated based on a BWPidentifier indicated by the BWP activation command BWPs are numbered,the activation command indicates a BWP that needs to be activated, andthe BWP is activated by a UE, thereby improving the flexibility of BWPactivation control.

Referring to FIG. 9 , FIG. 9 is a structural diagram of a UE accordingto an embodiment of the present disclosure, which can implement detailsof the method for controlling activation of a bandwidth part (BWP) inthe foregoing embodiments, and can achieve the same effects. As shown inFIG. 9 , the UE 900 includes a radio frequency (RF) circuit 910, amemory 920, an input unit 930, a display unit 940, a processor 950, anaudio circuit 960, a communication module 970, and a power supply 980,and further includes a camera (not shown).

The input unit 930 may be configured to receive numeric or characterinformation inputted by a user, and to generate signal inputs related touser settings and function control of the UE 900. Specifically, in anembodiment of the present disclosure, the input unit 930 may include atouch panel 931. The touch panel 931, also referred to as a touchscreen, may collect touch operations by the user on or near the touchpanel (such as an operation performed by the user using any suitableobject or accessory such as a finger or a stylus on the touch panel931), and drive a corresponding connection apparatus according to apredetermined program. Optionally, the touch panel 931 may include twoparts: a touch detection apparatus and a touch controller. The touchdetection apparatus is configured to detect a touch position of theuser, detect a signal generated due to the touch operation, and transmitthe signal to the touch controller; and the touch controller isconfigured to receive the touch information from the touch detectiondevice, convert the touch information into contact coordinates, send thecontact coordinates to the processor 950, and receive and executecommands from the processor 950. In addition, the touch panel 931 may beimplemented in various types such as resistive, capacitive, infrared,and surface acoustic waves. In addition to the touch panel 931, theinput unit 930 may further include other input devices 932. The inputdevices 932 may include, but not limited to, one or more of a physicalkeyboard, a function button (such as a volume control button and aswitch buttons), a trackball, a mouse, or a joystick.

The display unit 940 may be configured to display information inputtedby the user or information provided to the user and various menuinterfaces of the UE 900. The display unit 940 may include a displaypanel 941. Optionally, the display panel 941 may be configured in theform of a liquid crystal display (LCD) panel or an organiclight-emitting diode (OLED).

It should be noted that the touch panel 931 may cover the display panel941 to form a touch display screen, and when the touch display screendetects a touch operation on or near it, the touch operation istransmitted to the processor 950 to determine the type of the touchevent, and then the processor 950 provides a corresponding visual outputon the touch display screen based on the type of touch event.

The processor 950 is the control center of the UE 900, which connectsvarious parts of the entire mobile phone by using various interfaces andwirings, performs functions of the UE 900 and process data by running orexecuting software programs and/or modules stored in a first memory 921and invoking data stored in a second memory 922, thereby performingoverall monitoring on the UE 900. Optionally, the processor 950 mayinclude one or more processing units.

In an embodiment of the present disclosure, by calling a softwareprogram and/or a module stored in the first memory 921, and/or datastored in the second memory 922, the computer program is executed by theprocessor 950 to perform the following steps:

-   -   receiving and saving BWP configuration information transmitted        by a base station, where the BWP configuration information        includes BWP identification information;    -   receiving a BWP activation command transmitted by the base        station; and    -   performing BWP activation with a BWP identifier indicated by the        BWP activation command.

Optionally, the BWP configuration information is used to indicate adefault BWP corresponding to each component carrier; and the computerprogram is executed by the processor 950 to further perform thefollowing steps:

-   -   receiving a component carrier activation signaling transmitted        by the base station; and    -   activating, based on the component carrier activation signaling,        a first target component carrier and a default BWP corresponding        to the first target component carrier.

Optionally, a manner where the BWP configuration information indicatesthe default BWP corresponding to each component carrier includes any ofthe following manners:

-   -   for a component carrier configured with a BWP set, one bit is        used to indicate whether each BWP in the BWP set is the default        BWP;    -   for a component carrier configured with a BWP set, a BWP ranked        first or last in the BWP set is the default BWP;    -   for a component carrier configured with a BWP set, each BWP has        an index value, and a BWP with an initial index value in the BWP        set is the default BWP;    -   for a component carrier configured with a BWP set, a BWP with a        maximum bandwidth or a minimum bandwidth in the BWP set is the        default BWP; or    -   for a component carrier configured with a BWP set, a BWP with a        maximum starting frequency or a minimum starting frequency in        the BWP set is the default BWP.

Optionally, the computer program is executed by the processor 950 tofurther perform the following steps:

-   -   receiving a BWP deactivation command transmitted by the base        station, where the BWP deactivation command is configured to        adjust an activated BWP on a second target component carrier to        a deactivated state; and    -   deactivating the second target component carrier, or        deactivating the second target component carrier and a        corresponding BWP on the second target component carrier, in a        case that the activated BWP to be adjusted on the second target        component carrier is a last activated BWP.

Optionally, the computer program is executed by the processor 950 tofurther perform the following steps:

-   -   receiving a component carrier deactivation signaling transmitted        by the base station; and    -   deactivating, based on the component carrier deactivation        signaling, a third target component carrier, or a third target        component carrier and all activated BWPs on the third target        component carrier.

Optionally, the BWP activation command is configured to adjust adeactivated BWP on a fourth target component carrier to an activatedstate; and the fourth target component carrier and a BWP designated tobe activated through the BWP activation command is activated, in a casethat the fourth target component carrier is in an inactive state.

Optionally, the BWP configuration information includes BWP configurationinformation of a primary base station and BWP configuration informationof a secondary base station; and when the BWP configuration informationof the secondary base station is received, the BWP configurationinformation of the secondary base station is used to indicate acomponent carrier where a primary cell of the secondary base station islocated, and default BWP information corresponding to each componentcarrier. The computer program is executed by the processor 950 tofurther perform the following steps:

-   -   activating a default BWP corresponding to the component carrier        where the primary cell of the secondary base station is located.

Optionally, the computer program is executed by the processor 950 tofurther perform the following steps:

-   -   receiving a primary cell handover command transmitted by the        base station, where the primary cell handover command is        configured to indicate a target primary cell as a handover cell        and a default BWP on the target primary cell; and    -   performing a cell handover based on the default BWP on the        target primary cell and the target primary cell.

In view of the above, in the embodiments of the present disclosure, BWPconfiguration information transmitted by a base station is received andsaved, where the BWP configuration information includes BWPidentification information; a BWP activation command transmitted by thebase station is received; and a BWP is activated based on a BWPidentifier indicated by the BWP activation command BWPs are numbered,the activation command indicates a BWP that needs to be activated, andthe BWP is activated by a UE, thereby improving the flexibility of BWPactivation control.

Referring to FIG. 10 , FIG. 10 is a schematic structural diagram of abase station according to an embodiment of the present disclosure, whichcan implement details of the method for controlling activation of abandwidth part (BWP) in the foregoing embodiments, and can achieve thesame effects. As shown in FIG. 10 , the base station 1000 includes: aprocessor 1001, a transceiver 1002, a memory 1003, a user interface1004, and a bus interface. The processor 1001 is configured to read aprogram in the memory 1003 and execute the following processes:

-   -   transmitting BWP configuration information to a user equipment,        where the BWP configuration information includes BWP index        information; and    -   transmitting a BWP activation command to the user equipment,        where the BWP activation-related command is configured for the        user equipment to perform BWP activation with a BWP index        indicated by the BWP activation-related command.

In FIG. 10 , a bus architecture may include any number of interconnectedbuses and bridges, and may be specifically configured to couple variouscircuits including one or more processors represented by the processor1001 and storages represented by the memory 1003. The bus architecturemay also couple various other circuits such as peripherals, voltageregulators and power management circuits, which are well known in theart. Therefore, a detailed description thereof is omitted herein. A businterface provides an interface. The transceiver 1002 may be multipleelements, i.e., including a transmitter and a receiver, to allow forcommunication with various other apparatuses on the transmission medium.For different user equipment, the user interface 1004 may also be aninterface capable of may also be an interface capable of externally orinternally connecting the required devices, which includes, but notlimited to, a keypad, a display, a speaker, a microphone, a joystick,and the like.

The processor 1001 is responsible for the control of the busarchitecture and general processing, and the memory 1003 may store dataused by the processor 300 in performing operations.

Optionally, the BWP configuration information is used to indicate adefault BWP corresponding to each component carrier; and the program isexecuted by the processor 1001 to further perform the following steps:

-   -   transmitting a component carrier activation-related signaling to        the user equipment, where the component carrier        activation-related signaling is used for the user equipment to        activate a first target component carrier and a default BWP        corresponding to the first target component carrier.

Optionally, the BWP configuration information indicates a default BWPcorresponding to each component carrier as follows:

-   -   for a component carrier configured with a BWP set, one bit is        used to indicate whether each BWP in the BWP set is the default        BWP;    -   for a component carrier configured with a BWP set, a BWP ranked        first or last in the BWP set is the default BWP;    -   for a component carrier configured with a BWP set, each BWP has        an identification value, and a BWP with an initial        identification value in the BWP set is the default BWP;    -   for a component carrier configured with a BWP set, a BWP with a        maximum or minimum bandwidth in the BWP set is the default BWP;        or    -   for a component carrier configured with a BWP set, a BWP with a        maximum or minimum starting frequency in the BWP set is the        default BWP.

Optionally, the program is executed by the processor 1001 to furtherperform the following steps:

-   -   transmitting a BWP deactivation-related command to the user        equipment,    -   where the BWP deactivation-related command is configured to        instruct the user equipment to adjust an activated BWP on a        second target component carrier to a deactivated state; and    -   the BWP deactivation-related command is configured to instruct        the user equipment to deactivate the second target component        carrier, or deactivate the second target component carrier and a        corresponding BWP on the second target component carrier, in a        case that the activated BWP to be adjusted is a last activated        BWP on the second target component carrier.

Optionally, the program is executed by the processor 1001 to furtherperform the following steps:

-   -   transmitting a component carrier deactivation-related signaling        to the user equipment, where the component carrier        deactivation-related signaling is configured to instruct the        user equipment to deactivate a third target component carrier,        or to deactivate a third target component carrier and all        activated BWPs on the third target component carrier.

Optionally, the BWP activation-related command is configured to adjust adeactivated BWP on a fourth target component carrier to an activatedstate; and the BWP activation-related command is configured to instructthe user equipment to activate the fourth target component carrier and aBWP designated to be activated through the BWP activation-relatedcommand, in a case that the fourth target component carrier is in aninactive state.

Optionally, the BWP configuration information includes BWP configurationinformation of a primary base station and BWP configuration informationof a secondary base station; and the BWP configuration information ofthe secondary base station is used to indicate a component carrier wherea primary cell of the secondary base station is located, and default BWPinformation corresponding to each component carrier.

Optionally, the program is executed by the processor 1001 to furtherperform the following steps:

-   -   transmitting a primary cell handover command to the user        equipment, where the primary cell handover command is configured        to indicate a target primary cell as a handover cell and a        default BWP on the target primary cell.

In view of the above, in the embodiments of the present disclosure, BWPconfiguration information transmitted by a base station is received andsaved, where the BWP configuration information includes BWP indexinformation; a BWP activation-related command transmitted by the basestation is received; and a BWP is activated based on a BWP indexindicated by the BWP activation-related command BWPs are numbered, theactivation-related command indicates a BWP that needs to be activated,and the BWP is activated by a UE, thereby improving the flexibility ofBWP activation control.

An embodiment of the present disclosure further provides acomputer-readable storage medium, having stored a computer programthereon. The computer program is executed by a processor to implementssteps in a method for controlling activation of a bandwidth part (BWP)in any one of the foregoing method embodiments.

A person skilled in the art may be aware that, the exemplary units andalgorithm steps described in connection with the embodiments disclosedin this specification may be implemented by electronic hardware or acombination of computer software and electronic hardware. Whether thefunctions are performed by hardware or software depends on particularapplications and design constraint conditions of the technicalsolutions. A person skilled in the art may use different methods toimplement the described functions for each particular application, butit should not be considered that the implementation goes beyond thescope of the disclosure.

It may be clearly understood by a person skilled in the art that, forease of description and conciseness, for a detailed working process ofthe foregoing system, apparatus, and unit, reference may be made to acorresponding process in the foregoing method embodiments, and detailsare not described herein again.

In the several embodiments provided in the present application, itshould be understood that the disclosed device and method may beimplemented in other manners. For example, the described deviceembodiment is merely exemplary. For example, the unit division is merelylogical function division and may be other division in actualimplementation. For example, a plurality of units or components may becombined or integrated into another system, or some features may beneglected or not performed. In addition, the displayed or discussedmutual couplings or direct couplings or communication connections may beimplemented through some interfaces. The indirect couplings orcommunication connections between the devices or units may beimplemented in electric, mechanical, or other forms.

The units described as separate parts may or may not be physicallyseparate, and parts displayed as units may or may not be physical units,that is, may be located in one position, or may be distributed on aplurality of network units. A part or all of the units may be selectedaccording to actual needs to achieve the objectives of the solutions ofthe embodiments of the present disclosure.

In addition, functional units in the embodiments of the presentdisclosure may be integrated into one processing unit, or each of theunits may exist alone physically, or two or more units may be integratedinto one unit.

If the functions are implemented in a form of a software functional unitand sold or used as an independent product, the functions may be storedin a computer-readable storage medium. Based on such an understanding,essential part or the part contributing to the prior art of thetechnical solutions of the present disclosure, or a part of thetechnical solutions may be implemented in a form of a software product.The software product is stored in a storage medium, and includes severalinstructions for instructing a computer device (which may be a personalcomputer, a server, or a network device) to perform all or a part of thesteps of the methods described in the embodiments of the disclosure. Theforegoing storage medium includes any medium that may store programcode, such as a universal serial bus (USB) flash drive, a mobile harddisk, an ROM, an RAM, a magnetic disk, or an optical disc.

The above descriptions are merely specific implementations of thepresent disclosure, but the scope of the present disclosure is notlimited thereto. Any modifications and substitutions easily made by aperson of ordinary skill in the art without departing from the technicalprinciple of the present disclosure shall fall within the scope of thepresent disclosure. Therefore, the scope of the present disclosure shallbe determined by the claims.

What is claimed is:
 1. A method for controlling activation of abandwidth part (BWP), comprising: receiving BWP configurationinformation transmitted by a base station; receiving a primary cellhandover command transmitted by the base station, wherein the primarycell handover command is configured to indicate a target primary cellfor handover and a default BWP on the target primary cell; andperforming a cell handover based on the default BWP on the targetprimary cell and the target primary cell; wherein the BWP configurationinformation comprises BWP configuration information of a primary basestation and BWP configuration information of a secondary base station;when the BWP configuration information of the secondary base station isreceived, the BWP configuration information of the secondary basestation is used to indicate a component carrier where a primary cell ofthe secondary base station is located, and default BWP informationcorresponding to each component carrier; and after receiving the BWPconfiguration information transmitted by the base station, the methodfurther comprises: activating a default BWP corresponding to thecomponent carrier where the primary cell of the secondary base stationis located.
 2. The method according to claim 1, wherein the BWPconfiguration information is used to indicate a default BWPcorresponding to each component carrier; and after receiving the BWPconfiguration information transmitted by the base station, the methodfurther comprises: receiving a component carrier activation signalingtransmitted by the base station; and activating, based on the componentcarrier activation signaling, a first target component carrier and adefault BWP corresponding to the first target component carrier.
 3. Themethod according to claim 2, wherein a manner where the BWPconfiguration information indicates the default BWP corresponding toeach component carrier comprises any of the following manners: a mannerin which, for a component carrier configured with a BWP set, one bit isused to indicate whether each BWP in the BWP set is the default BWP; amanner in which, for a component carrier configured with a BWP set, aBWP ranked first or last in the BWP set is the default BWP; a manner inwhich, for a component carrier configured with a BWP set, each BWP hasan index value, and a BWP with an initial index value in the BWP set isthe default BWP; a manner in which, for a component carrier configuredwith a BWP set, a BWP with a maximum bandwidth or a minimum bandwidth inthe BWP set is the default BWP; or a manner in which, for a componentcarrier configured with a BWP set, a BWP with a maximum startingfrequency or a minimum starting frequency in the BWP set is the defaultBWP.
 4. The method according to claim 1, wherein after receiving the BWPconfiguration information transmitted by the base station, the methodfurther comprises: receiving a BWP deactivation command transmitted bythe base station, wherein the BWP deactivation command is configured toadjust an activated BWP on a second target component carrier to adeactivated state; and deactivating the second target component carrier,or deactivating the second target component carrier and a correspondingBWP on the second target component carrier, in a case that the activatedBWP to be adjusted on the second target component carrier is a lastactivated BWP.
 5. The method according to claim 1, wherein afterreceiving the BWP configuration information transmitted by the basestation, the method further comprises: receiving a component carrierdeactivation signaling transmitted by the base station; anddeactivating, based on the component carrier deactivation signaling, athird target component carrier, or a third target component carrier andall activated BWPs on the third target component carrier.
 6. The methodaccording to claim 1, further comprising: receiving a BWP activationcommand transmitted by the base station; and performing BWP activationwith a BWP identifier indicated by the BWP activation command, whereinthe BWP activation command is configured to adjust a deactivated BWP ona fourth target component carrier to an activated state; and theperforming BWP activation with the BWP identifier indicated by the BWPactivation command comprises: activating the fourth target componentcarrier and a BWP designated to be activated through the BWP activationcommand, in a case that the fourth target component carrier is in adeactivated state.
 7. The method according to claim 1, wherein the BWPconfiguration information comprises BWP identification information; themethod further comprises: receiving a BWP activation command transmittedby the base station; and performing BWP activation with a BWP identifierindicated by the BWP activation command.
 8. A method for controllingactivation of a bandwidth part (BWP), comprising: transmitting BWPconfiguration information to a user equipment; and transmitting aprimary cell handover command to the user equipment, wherein the primarycell handover command is configured to indicate a target primary cellfor handover and a default BWP on the target primary cell; wherein theBWP configuration information is used to indicate a default BWPcorresponding to each component carrier; and after transmitting the BWPconfiguration information to the user equipment, the method furthercomprises: transmitting a component carrier activation signaling to theuser equipment, wherein the component carrier activation signaling isused for the user equipment to activate a first target component carrierand a default BWP corresponding to the first target component carrier;wherein the BWP configuration information comprises BWP configurationinformation of a primary base station and BWP configuration informationof a secondary base station; and the BWP configuration information ofthe secondary base station is used to indicate a component carrier wherea primary cell of the secondary base station is located, and default BWPinformation corresponding to each component carrier.
 9. The methodaccording to claim 8, wherein a manner where the BWP configurationinformation indicates a default BWP corresponding to each componentcarrier comprises any of the following manners: a manner in which, for acomponent carrier configured with a BWP set, one bit is used to indicatewhether each BWP in the BWP set is the default BWP; a manner in which,for a component carrier configured with a BWP set, a BWP ranked first orlast in the BWP set is the default BWP; a manner in which, for acomponent carrier configured with a BWP set, each BWP has an indexvalue, and a BWP with an initial index value in the BWP set is thedefault BWP; a manner in which, for a component carrier configured witha BWP set, a BWP with a maximum bandwidth or a minimum bandwidth in theBWP set is the default BWP; or a manner in which, for a componentcarrier configured with a BWP set, a BWP with a maximum startingfrequency or a minimum starting frequency in the BWP set is the defaultBWP.
 10. The method according to claim 8, wherein after transmitting theBWP configuration information to the user equipment, the method furthercomprises: transmitting a BWP deactivation command to the userequipment, wherein the BWP deactivation command is configured toinstruct the user equipment to adjust an activated BWP on a secondtarget component carrier to a deactivated state; and the BWPdeactivation command is configured to instruct the user equipment todeactivate the second target component carrier, or deactivate the secondtarget component carrier and a corresponding BWP on the second targetcomponent carrier, in a case that the activated BWP to be adjusted is alast activated BWP on the second target component carrier.
 11. Themethod according to claim 8, wherein after transmitting the BWPconfiguration information to the user equipment, the method furthercomprises: transmitting a component carrier deactivation signaling tothe user equipment, wherein the component carrier deactivation signalingis configured to instruct the user equipment to deactivate a thirdtarget component carrier, or to deactivate a third target componentcarrier and all activated BWPs on the third target component carrier.12. The method according to claim 8, further comprising: transmitting aBWP activation command to the user equipment, wherein the BWP activationcommand is configured for the user equipment to perform BWP activationwith a BWP identifier indicated by the BWP activation command, whereinthe BWP activation command is configured to adjust a deactivated BWP ona fourth target component carrier to an activated state; and the BWPactivation command is configured to instruct the user equipment toactivate the fourth target component carrier and a BWP designated to beactivated through the BWP activation command, in a case that the fourthtarget component carrier is in a deactivated state.
 13. The methodaccording to claim 8, wherein the BWP configuration informationcomprises BWP identification information; the method further comprises:transmitting a BWP activation command to the user equipment, wherein theBWP activation command is configured for the user equipment to performBWP activation with a BWP identifier indicated by the BWP activationcommand.
 14. A user equipment, comprising: one or more processors; amemory; and one or more programs, wherein the one or more programs arestored in the memory and configured to be executed by the one or moreprocessors, and when executing the one or more programs, the one or moreprocessors are configured to: receive BWP configuration informationtransmitted by a base station; receive a primary cell handover commandtransmitted by the base station, wherein the primary cell handovercommand is configured to indicate a target primary cell for handover anda default BWP on the target primary cell; and perform a cell handoverbased on the default BWP on the target primary cell and the targetprimary cell; wherein the BWP configuration information comprises BWPconfiguration information of a primary base station and BWPconfiguration information of a secondary base station; when the BWPconfiguration information of the secondary base station is received, theBWP configuration information of the secondary base station is used toindicate a component carrier where a primary cell of the secondary basestation is located, and default BWP information corresponding to eachcomponent carrier; and when executing the one or more programs, the oneor more processors are configured to: after the BWP configurationinformation transmitted by the base station is received, activate adefault BWP corresponding to the component carrier where the primarycell of the secondary base station is located.
 15. The user equipmentaccording to claim 14, wherein the BWP configuration information is usedto indicate a default BWP corresponding to each component carrier; andthe one or more processors are further configured to receive a componentcarrier activation signaling transmitted by the base station; andactivate, based on the component carrier activation signaling, a firsttarget component carrier and a default BWP corresponding to the firsttarget component carrier.
 16. The user equipment according to claim 14,wherein the one or more processors are further configured to: receive acomponent carrier deactivation signaling transmitted by the basestation; and deactivate, based on the component carrier deactivationsignaling, a third target component carrier, or a third target componentcarrier and all activated BWPs on the third target component carrier.17. The user equipment according to claim 15, wherein a manner where theBWP configuration information indicates the default BWP corresponding toeach component carrier comprises any of the following manners: a mannerin which, for a component carrier configured with a BWP set, one bit isused to indicate whether each BWP in the BWP set is the default BWP; amanner in which, for a component carrier configured with a BWP set, aBWP ranked first or last in the BWP set is the default BWP; a manner inwhich, for a component carrier configured with a BWP set, each BWP hasan index value, and a BWP with an initial index value in the BWP set isthe default BWP; a manner in which, for a component carrier configuredwith a BWP set, a BWP with a maximum bandwidth or a minimum bandwidth inthe BWP set is the default BWP; or a manner in which, for a componentcarrier configured with a BWP set, a BWP with a maximum startingfrequency or a minimum starting frequency in the BWP set is the defaultBWP.
 18. The user equipment according to claim 14, wherein the one ormore processors are further configured to: receive a BWP deactivationcommand transmitted by the base station, wherein the BWP deactivationcommand is configured to adjust an activated BWP on a second targetcomponent carrier to a deactivated state; and deactivate the secondtarget component carrier, or deactivate the second target componentcarrier and a corresponding BWP on the second target component carrier,in a case that the activated BWP to be adjusted on the second targetcomponent carrier is a last activated BWP.
 19. The user equipmentaccording to claim 14, wherein the one or more processors are furtherconfigured to: receive a BWP activation command transmitted by the basestation; and perform BWP activation with a BWP identifier indicated bythe BWP activation command, wherein the BWP activation command isconfigured to adjust a deactivated BWP on a fourth target componentcarrier to an activated state; and the one or more processors arefurther configured to: activate the fourth target component carrier anda BWP designated to be activated through the BWP activation command, ina case that the fourth target component carrier is in a deactivatedstate.
 20. The user equipment according to claim 14, wherein the BWPconfiguration information comprises BWP identification information; theone or more processors are further configured to: receive a BWPactivation command transmitted by the base station; and perform BWPactivation with a BWP identifier indicated by the BWP activationcommand.